Collaborative Stage

Note 1: The surgery to remove as much of the cancer in the pelvis and/or abdomen as possible, reducing the "bulk" of the cancer is called "debulking" or "cytoreduction" surgery.
Note 2: It is performed when there is widespread evidence of advanced stage of ovarian cancer with obvious spread to other organs outside of the ovary typically in the upper abdomen, intestines, the omentum (the fat pad that, like an apron, hangs off the colon) or the diaphragm or liver.
Note 3: This effect of this procedure is associated with patient survival. Therefore recording whether the patient received chemotherapy prior to this procedure is necessary for survival.

Code	Description
010	Ovary
020	Fallopian Uterus
030	010 + 020
040	020 + 020 Received chemotherapy
050	Pelvic peritoneum retroperitoneum
060	050 + (010 or 020)
070	060 and Received chemotherapy
080	Omentum
090	080 + (010 or 020 or 050)
100	090 and Received chemotherapy
110	Abdominal peritoneum retroperitoneum
120	110 + (010 or 020 or 050 or 080)
130	120 and Received chemotherapy
140	Intestines
150	140 + (010 or 020 or 050 or 080 or 110)
160	150 and Received chemotherapy
170	Diaphragm
180	170 + (010 or 020 or 050 or 080 or 110 or 140)
190	180 and Received chemotherapy
200	Liver
210	200 + (010 or 020 or 050 or 080 or 110 or 140 or 170)
220	210 and Received chemotherapy
888	OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this site
988	Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T,N,M, or any stage, use of code 988 may result in an error.)
999	Unknown Not documented in patient record

CS Site-Specific Factor 4
Tumor Location after Primary Cytoreduction (Debulking) Surgery